Sounds like a possible head gasket. Code P0300 is random/multi-cylinder misfire.
When you did were any of the electrodes clean or wet. If so it's gonna be a head
gasket. Run a compression test to be sure. If 2 adjacent cylinders are very low or
read zero psi. It's definatly a head gasket. -Jim

2003 cavalier has a miss at idle rpm goes from 500 to 1000 i relaced plugs,wires,o2senser,iacsenser... module,intake gasket,doesent have a pcv valve but unpluged a hole in intake cause it build pressu...

i need hellpppppppp. . . I was told it could be that the gear stick is off track or that the transmission could have slipped. The car starts perfect. Only thing is when i purchased the car i noticed t...

I am very curios as to how to check the transmission fluid on a 2001 chevy cavalier. I have had my car since 2001 and still have not found anywhere to check the fluid or fill it. My manuel states that...

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